Whenever I add this, it doesn't join with the right Date Field and it stays as a independent field
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Rodrigo AlvesOct 14 '11 at 0:28

Rodrigo I think you must have DetailsView set to auto generate the rows. In the tag for the details view you will have to put AutoGenerateRows="False" Doing this though means you will have to add all your other field as bound field like above.
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Philb28Dec 15 '11 at 14:51